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arm_dyncom_thumb: Fix handling of writeback for thumb LDMIA

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This commit is contained in:
Lioncash 2015-06-04 08:42:14 -04:00
parent 7589a5ad4d
commit 04f204ed00
1 changed files with 19 additions and 5 deletions
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24
src/core/arm/dyncom/arm_dyncom_thumb.cpp
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@ -327,11 +327,25 @@ tdstate thumb_translate(u32 addr, u32 instr, u32* ainstr, u32* inst_size) {
case 24: // STMIA
case 25: // LDMIA
*ainstr = ((tinstr & (1 << 11)) // base
? 0xE8B00000 // LDMIA
: 0xE8A00000) // STMIA
|((tinstr & 0x0700) << (16 - 8)) // Rb
|(tinstr & 0x00FF); // mask8
if (tinstr & (1 << 11))
{
unsigned int base = 0xE8900000;
unsigned int rn = BITS(tinstr, 8, 10);
// Writeback
if ((tinstr & (1 << rn)) == 0)
base |= (1 << 21);
*ainstr = base // base (LDMIA)
| (rn << 16) // Rn
| (tinstr & 0x00FF); // Register list
}
else
{
*ainstr = 0xE8A00000 // base (STMIA)
| (BITS(tinstr, 8, 10) << 16) // Rn
| (tinstr & 0x00FF); // Register list
}
break;
case 26: // Bcc